upside is a user on octodon.social. You can follow them or interact with them if you have an account anywhere in the fediverse.
If you don't, you can sign up here.
Q. "On Android, I really need multiple Mastodon account support."
A. "Try TootyFruity."
https://play.google.com/store/apps/details?id=ch.kevinegli.tootyfruity221258
